| Author |
Message |
gillig-dan (63.111.68.130)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, August 09, 2004 - 1:49 pm: | |
I am considering adding a split AC system to my '70 Gillig 636 that has introduced me to this bus community a few weeks ago. The system I'm considering has a skirt mounted condenser and fairly compact evaporator unit (30K btu/h). I was wondering if I could rig up a mechanical system to switch between running the system off the engine or hooking it to an AC motor. I figured I can get by with about 20K, or less, btu's when parked. I should be able to generate that with about 2 horsepower of electric motor, right? I figured this would draw about 20+/- amps @ 110 VAC. The bus came with 2 small window units (5000 btu/h @ 4.5 A.) that just about keep up as long as I don't open any curtains. There is no air conditioning in the bus yet.
I am looking for guidance to see if my thoughts are correct. I am confident I can make the belt switching system work. I'll probably fabricate a belt tensioning system with air actuators.
The system I am looking at does not have a compressor and I am also wondering what compressor would be a good match. I found a good price on a Sanden 5H14-HD, which is an 8 cu inch model. I am having trouble finding specs on the horsepower that would be required and the RPM that would be the most efficient.
'70 636 Gillig-Dan in Virginia |
Jerry Liebler (165.121.33.162)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, August 09, 2004 - 9:33 pm: | |
Dan,
Finding a high efficiency compressor I found impossible & found buying packaged units easier.
If you are willing to buck the conventional.
I have 2 Sunpentown 10,000 BTU/h portables in my 4107. They are very energy efficient, each draws 6 amps (EER of 15+). I am easily powering them with the bus alternator and my Tace PS2512 or a 15 amp shore cord. My bus is esentially un insulated (factory fiberglass) and has all windows, original & unshaded. I did recently add a ceramic roof coating (Supertherm) and it helps a lot. Sitting in the sun with the outside temp 96 (today), The back bus interior is 82 but the driver and copilot are in a 75 degree region of high airflow. It's quite comfortable. I have the portables positioned behind the driver and copilot and have the cool air flowing forward. They are quite small, about 16" x 16" floor space and about 30" high. I have a short duct out thru the side to exaust the heat. It sounds like you have less heat gain than I. I'm planning on better & more insulation and a third unit above the engine in the bedroom. With 30,000 BTU/h I can still get by with a 20 amp shore cord (the beauty of the Trace is it'll supply starting surges from battery).
Regards
Jerry 4107 1120 |
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